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101 lines
3.4 KiB
C
101 lines
3.4 KiB
C
/*
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* Copyright (C) 2015-2017 Simon Brummer
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup net_gnrc_tcp
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*
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* @{
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*
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* @file
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* @brief GNRC TCP transmission control block (TCB)
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*
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* @author Simon Brummer <simon.brummer@posteo.de>
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*/
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#ifndef NET_GNRC_TCP_TCB_H
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#define NET_GNRC_TCP_TCB_H
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#include <stdint.h>
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#include "ringbuffer.h"
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#include "mutex.h"
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#include "evtimer_msg.h"
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#include "evtimer_mbox.h"
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#include "msg.h"
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#include "mbox.h"
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#include "net/gnrc/pkt.h"
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#include "config.h"
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#ifdef MODULE_GNRC_IPV6
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#include "net/gnrc/ipv6.h"
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Transmission control block of GNRC TCP.
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*/
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typedef struct sock_tcp {
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uint8_t address_family; /**< Address Family of local_addr / peer_addr */
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#ifdef MODULE_GNRC_IPV6
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uint8_t local_addr[sizeof(ipv6_addr_t)]; /**< Local IP address */
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uint8_t peer_addr[sizeof(ipv6_addr_t)]; /**< Peer IP address */
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int8_t ll_iface; /**< Link layer interface id to use. */
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#endif
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uint16_t local_port; /**< Local connections port number */
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uint16_t peer_port; /**< Peer connections port number */
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uint8_t state; /**< Connections state */
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uint8_t status; /**< A connections status flags */
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uint32_t snd_una; /**< Send unacknowledged */
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uint32_t snd_nxt; /**< Send next */
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uint16_t snd_wnd; /**< Send window */
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uint32_t snd_wl1; /**< SeqNo. from last window update */
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uint32_t snd_wl2; /**< AckNo. from last window update */
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uint32_t rcv_nxt; /**< Receive next */
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uint16_t rcv_wnd; /**< Receive window */
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uint32_t iss; /**< Initial sequence sumber */
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uint32_t irs; /**< Initial received sequence number */
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uint16_t mss; /**< The peers MSS */
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uint32_t rtt_start; /**< Timer value for rtt estimation */
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int32_t rtt_var; /**< Round trip time variance */
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int32_t srtt; /**< Smoothed round trip time */
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int32_t rto; /**< Retransmission timeout duration */
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uint8_t retries; /**< Number of retransmissions */
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evtimer_msg_event_t event_retransmit; /**< Retransmission event */
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evtimer_msg_event_t event_timeout; /**< Timeout event */
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evtimer_mbox_event_t event_misc; /**< General purpose event */
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gnrc_pktsnip_t *pkt_retransmit; /**< Pointer to packet in "retransmit queue" */
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mbox_t *mbox; /**< TCB mbox for synchronization */
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uint8_t *rcv_buf_raw; /**< Pointer to the receive buffer */
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ringbuffer_t rcv_buf; /**< Receive buffer data structure */
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mutex_t fsm_lock; /**< Mutex for FSM access synchronization */
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mutex_t function_lock; /**< Mutex for function call synchronization */
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struct sock_tcp *next; /**< Pointer next TCB */
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} gnrc_tcp_tcb_t;
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/**
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* @brief Transmission control block queue.
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*/
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typedef struct sock_tcp_queue {
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mutex_t lock; /**< Mutex for access synchronization */
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gnrc_tcp_tcb_t *tcbs; /**< Pointer to TCB sequence */
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size_t tcbs_len; /**< Number of TCBs behind member tcbs */
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} gnrc_tcp_tcb_queue_t;
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/**
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* @brief Static initializer for type gnrc_tcp_tcb_queue_t
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*/
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#define GNRC_TCP_TCB_QUEUE_INIT { MUTEX_INIT, NULL, 0 }
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#ifdef __cplusplus
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}
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#endif
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#endif /* NET_GNRC_TCP_TCB_H */
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/** @} */
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